Raven AC one motor

I use the Millenium mat that came with my TW raven AC-3 and it is very good. This is what Thomas recommends and uses I believe.
I also have the Boston mat, but have not really used it yet. I will try it out and comment

I also have a VPI HRX and the VPI outer ring definitely does not fit.

I invested in a Orb ( OEM of air tight old model) LP flatener from Japan. Works well except on new Universal 180gm re-issues.

I used the Boston mat last night. I prefer the Millenium mat.
With The Millenium there seems to better hight end extension and better bass flow.
With the Boston, the treble is not as detailed and the upper mids is a little forward. Me with a lot of non audiophile recordings the Boston has too much forwardness.
The bass of the Boston does not sem to have the same sense of flow, PRAT and punch as the Millenium.

Small differences yes, but definately easily heard in my system.